Chopping board



FIG. 1 is a top oblique view of a chopping board showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a side view thereof; and,

FIG. 4 is an enlarged side view thereof.

The bottom and missing side view, not shown, forms no part of the claimed design. 

CLAIM The ornamental design for a chopping board, as shown and described. 